{ "client_name": "dyz", "client_id": "50013420020324xxxx" }
curl --location --request POST 'http://localhost:8080/api/checkin' \ --header 'Content-Type: application/json' \ --data-raw '{ "client_name": "dyz", "client_id": "50013420020324xxxx" }'
{ "status": "OK", "allocate_room": 101 }